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Fairing Block
Transducer
FORWARD
Typical Thru-Hull Transducer Locations
~ 1/4 to 1/3 L
L = Length of Waterline
Displacement Power
Transducer
L = Length of Waterline
Transducers
Forward Direction
The orientation of the mounted transducers is critical
to the performance of the PC/180. Note that the
more blunt, rounded end of each transducer should
be pointed forward. The angled, more narrow ends
should be pointed aft as shown in the figure at left.
Selecting the Best Location
The best location to mount the thru-hull transducer
will vary with the type of boat. In order to simplify
the installation, attempt to find a location with a
small dead-rise angle.
a. On displacement hulls (sailboats, trawlers, etc.)
Full Keel Sailboat
b. On planing powerboat hulls, the transducer
Vessel Hull
DO NOT install a bronze transducer housing di-
rectly into an aluminum or steel hull because elec-
trolytic corrosion will occur.
~ 1/4 to 1/3 L
Transducer cables will need to be routed to the
Acoustic Interface Module. If you need transducer
cable lengths greater than the standard 30' length,
order three 30' extension cables (Interphase Part #
04-0014-008).
10
locate the transducer about 1/3 aft along the wa-
terline. Generally this provides the best compro-
mise between obtaining aeration-free water and
minimizing propeller noise. Water near the bow
and near the keel can be quite aerated. Since the
PC/180's transducer can not see through aerated
water, it is best to mount the transducer midway
between these two areas.
should be mounted well aft and close to the keel
to insure that the transducer is in contact with the
water at higher boat speeds. Unfortunately,
mounting the transducers well aft limits the max-
imum forward range in front of the vessel's bow.
However, the transducers must be in the water to
work and if they are mounted too far forward on a
planing hull they will often lose contact with the
water. In this situation, the PC/180 can only be
used at slower vessel speeds which do not result
in planing operation.
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